Smoke Detector with Interconnect and Timer
The is a low-current, CMOS circuit providing all of the required features for an ionization type smoke detector. A networking capability allows as many as 125 units to be interconnected so that if any unit senses smoke, all units will sound an alarm. In addition, special features are incorporated to facilitate alignment and test of the finished smoke detector. This device is designed to comply with Underwriters Laboratories Specification UL217.
Features
■ Interconnect up to 125 detectors
■ Piezoelectric horn driver
■ Guard outputs for detector input
■ Pulse testing for low battery
■ Power-on reset
■ Internal reverse battery protection
■ Internal timer and control for reduced sensitivity
■ Built-in hysteresis reduces false triggering